The phrase "a concrete problem in" is correct and usable in written English.
You can use it when discussing a specific, tangible issue within a particular field or context.
Example: "The researchers focused on finding solutions to a concrete problem in urban transportation."
Alternatives: "a specific issue in" or "a tangible challenge in".
Were North America, Europe and Russia to make defense of the entire Euro-Atlantic region against potential ballistic missile attack a joint priority, they would — apart from addressing a concrete problem — in a single stroke undermine much of the threat analysis that sets Russia against NATO, and prove that trilateral cooperation on a key security issue is possible.
This paper addresses a concrete problem in the field of power engineering.
There were both strong opinions against, in that the consensus reached may be unethical, and strong opinions in favor, in that consensus are needed for a concrete problem in a particular patient situation.
Although the development of this method was stimulated by a concrete problem in the field of febrile neutropenia, practice of re-randomization is used in other areas of medicine such as testing of treatments for epilepsy, recurrent headaches and anti-emetics in cancer chemotherapy.
Through this active-learning experience, students of various science backgrounds were able to come together and apply what they learned in the classroom, particularly the combinatorics of RNA, to solve a very concrete problem in computational biology.
Space is more of a concrete problem (especially if you live in a concrete jungle), but one I am confident you can solve.
A tutor can edit knowledge of the problem solution, after which he/she enters a concrete problem directly rather than by describing knowledge in Prolog.
This in turn leads to a number of very concrete problems in daily life when showing one's ID – in the bank or the post office, when using a credit card, or crossing borders.
Then some applications are given to concrete problems in moduli theory, in particular a new construction of surfaces with (p_g=q=1) is given.
"They spent more time thinking, especially about concrete problems in the immediate present.
Besides the pure mathematical interest, these results are necessary for concrete problems in physics and engineering [8, 9].
